Note 3 - Stock-Based Compensation (Details) (USD $)	0 Months Ended		3 Months Ended	9 Months Ended	120 Months Ended	62 Months Ended
	May 08, 2013	Feb. 15, 2013	Sep. 30, 2008	Sep. 30, 2013	Mar. 31, 2021 Scenario, Forecast [Member]	Sep. 30, 2013 Restricted Stock [Member]	Jan. 31, 2013 Restricted Stock [Member]
Note 3 - Stock-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)				1,125,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit				$ 2.88
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit				$ 22.54
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)				557,362
Share Price				$ 8.96
Restricted Common Stock, Shares, Grants in Period (in Shares)			200,000
Restricted Common Stock Grant Date Value		$ 4.83	$ 12.13
Restricted Common Stock Shares Vesting Period					10 years
Market Value Per Share of Common Stock	$ 6.00						$ 4.98
Stock Issued During Period, Shares, Share-based Compensation, Gross (in Shares)	30,830	42,910				36,961